Also charted in the jaw-dropping doc were some of Trump's interactions with other women.

Last year Fox News reporter Megyn Kelly challenged him on TV, at her peril. He accused her of "having blood coming out of her wherever".

Selina Scott made a documentary about him 1995 and she claims she was "stalked mentally" by him as he sent her 13 "extremely abusive" letters.

We've heard him talking about ridding the US of Muslims and accusing Mexico of forcing their "most unwanted people into the United States", including "criminals, drug dealers, rapists" but the documentary also showed him taking a pop at disabled people.

The most chilling aspect of Frei's documentary, however, was the very real prospect of Trump becoming president.

"I have to say the last time I saw crowds as enthusiastic as this was for Barack Obama in 2008," said Frei, terrifying words illustrated by the crowds of supporters at his rallies.